I've had my Cats for about a year and they have been very affectionate from the very beginning. They have spawned 5 times but the eggs always end up being eaten by my cats or they literally rot...the eggs get "furry" within about 4 days of being laid and my tank gets polluted.

So about 4 - 6 weeks ago, they spawned again and when the eggs became furry, I removed the eggs from the tank and cleaned the water.

This morning I got a big surprise when I noticed a tiny cory cat, then another, and yet another. So I guess some of the eggs were fertilized and thankfully I missed them. But since I didn't think any were going to hatch, I didn't separate them or make a note of when they hatched. I also didn't feed them any special fry food. It's probably amazing that they survived.

They are about 1/2 inch long (one is a little smaller).
They are very active and stay out in the open.

Any idea about how old they might be?Should I be doing anything “special” for them?